>>564459Owning land doesn't allow you to do whatever you want with it.
According to French regulations :
-farmland : for farming, pasture on, fishing, hunting, camping.
-building land : for building, providing that you comply with floor area ratio, maximum building height...etc.
Some villages have special regulations to protect architectural heritage and determine buildings architecture, windows and shutters shape and color...etc.
French legal system is based on Roman Law but yeah, many things changed after the French Revolution.